1 Division of Neuroradiology Santa Casa de Sao Paulo School of Medical Sciences Sao Paulo, Brazil.
2 Division of Neuroradiology Diagnosticos da America SA Sao Paulo, Brazil.
3 Ataxia Unit, Department of Neurology Universidade Federal de São Paulo Sao Paulo, Brazil.
4 Division of Neuroradiology Med Imagem, Hospital da Beneficencia Portuguesa de Sao Paulo Sao Paulo, Brazil.
5 Department of Neurology Universidade de São Paulo Sao Paulo, Brazil.
6 Division of Neuroradiology Santa Casa de Sao Paulo School of Medical Sciences Sao Paulo, Brazil Division of Neuroradiology Diagnosticos da America SA Sao Paulo, Brazil.